Device for automatically holding bolt-blanks.



v T. F. KELLY.

DEVICE FOR AUTOMATICALLY HOLDING BOLT BLANKS.

APPLICATION FILED DEC. 6, 1910. I

1 ,046,802. Patented Dec. 10, 1912.

3 SHEETS-SHEET 1.

\Mitness E51 'T. F. KELLY.

1,046,802. ,Patented Dec. 10,-1912.

3 EKEETHHEET 2.

I n-qn W1tuasses Trw'e'ntnr 1 I Thm nasFKell y v UNITED sTATEs PATEnTOFFICE.

'r'H-orms'r, KELLY, or rnw'rncxnrf n nonn ISLAND.

DEVICE Eon AUTOMATICALLY nonnme BOLT-mums.

- Be it known'that 1, Knhnr, a

citizen iof the United States. residing at Pawtucket, in the county ofProvidence and State of Rhode Island, have {invented cortain new anduseful Improvements in Devices for. Automatically Holding Bolt- Blanks,of which the'follo'wing is a specifi- 2 cation. 4 1 Q I This inventionrelates more particularly to devices for holding bolt-blanks in ma-:

chines devised for automatically feeding,

5 parts intermittent endwise movements to the pointing andscrew-threading bolt-blanks,

and it consists in the novel constructionand combination of parts orelements hereinafter set forth and claimed.

The objects sought to be attained in the invention forming the subjectofthis apphcation for U. S. patent are in general to! produce a simple andcomparatively inex-i pensive device capable of being successfullyoperated in connection with such machines and materially faster thananalogous dei vices, thereby producing a correspondingly? increased andmore perfect complete machines and out-put; and the cost of 'attendance,maintenance and power are reduced.

In the accompanying three sheets of- 'drawings Figure 1 represents apartial front 7:

side elevation of an automatic bolt-pointing and screw-threadingmachineembodying'iny improvements. In this figure the machine shows therelation of the parts while the. bolt-blank is being pointed. Fig. 2 isa central longitudinal sectional view, in enlarged scale, of thespindle, &c., controlling the movements of the cutting-tools. Fig. 3 isa 1 continuation of Fig. 2 from line a: m, the position of the severalparts corres ondmg f with Fig. 1. Fig. 4 is a longitudlnal sec tionalview of the die-head and the corresponding end portions of the spindleswhile 1 the screw-threading dies arein action. Fig. 5 represents an endelevation, in partial section, of the bolt-holder and its head, as 1viewed from the left.- Fig. 6 is a detail plan view of one of thelevers.

The following is a more detailed description of my improved device:

Referring now to Fig. 1, the several devices or moving parts are or maybe mounted on a suitable bed-piece a, in turn sup 1,046,802. H .s o m'ra m Patented Dec.10,1912.

Applieatjioniflled December .6,1 910. Seria1No.595,924.

fTo'aZZ concern: I A I .mounted in bearings the brackets or hangers bsecured to the underside of the cams, each in connection withcooperating levers,&c., are suitably positioned and timed and areemployed for actuating and controllingthefollowing operations :Oam (1imslidably guided plunger p so as to engage the lowermost vbolt-blank inthe runway r,

' thereby advancing and positioning it withrespect to the pair ofspring-pressed jaws m of the bolt-ho1der; cam e, &c., operate tosimultaneously move the jaws inward so as to clamp the head of the blankbetween them, and also to centralize and .hold it stationary while it isbeing screw-threaded.

I will describe means for automatically positioning the bolt-blankspreliminary to the pointing and screw-threading operations. v

In Fig. 1 is represented a runway 1- for the headed blanks a". Fromthe'bottom of the column of blanks in the relatively stationary runway(see also Figs. 1 and the lowermost blank is forced ahead by means of aplunger ;0 slidably mounted in ways formed in the tail-stock A,adjustably secured to the bed a.

I In the forward end of the tail-stock A is secured a block m, having atransverse seat formed in its front face or end, in which a m, thelatter being screwed into and extending through the outer end portion ofthe jaw to engage an arm n secured to a rod or rock-shaftn, arrangedtransversely of,

the machine. A pin m fixed to the station ary block m and extendingthrough said chamber and slotted openings'm", is in continuousengagement with the spring m;

the normal tendency of these springs is to 110 vertical runway 1' with anumber of superforce the jaws apart, the maximum outward movement beinglimited by the engagement of the inner ends of-the slots m with therespective pins m". A longitudinally extending guide or ways p is formedin the upper part of tail-stock A (Fig. 3) to receive the said plunger7). The shape of the guide portion cross-sectionally may correspond withthat of the bolt-head and plunger and extend through the back of theblock m, as at 79 and register with the jaw cavity m The device shownfor actuating and controlling the movements of'the bolt-holding jaws mconsists of a cam e, secured to shaft 0; a lever having its lower endengageable with the cam and fulcrumed to a stand or bracket a arock-shaft 91 before referred to, mounted in the forward end of thetailstock; a pair of short, upwardly extending, oppositely disposed armsn fixed to the respective ends of the shaft, and a lever 'n, also fixedto said shaft, having its free end portion extending downward at anangle and provided with a comparatively long slot n, engaged by theupper end of lever 1, all substantially as represented in Fig. 1.'lheinner face or surface of the upper portion of each arm n is curvedor wedgeshaped transversely, substantially as indicated at n", Fig. 6,so as to frictionally contact with the outer ends of bolt m, adjustablymounted in the corresponding or adjacent jaw m As thus devised, the saidmembers 6 12. n, and n when in'the nor mal position indicated by fulllines in Figs. 1 and 5, operate to snugly close the jaws m uponthe'he'ad of the previously positioned bolt-blank is, therebycentralizing and holding it stationary between them while the bolt isbeing acted upon by the pointing and threading dies.

I would state that the construction and arrangement of the cams securedto the continuously revoluble shaft 0, in cooperation with other parts,are such that the shaft makes one com lete revolution while eachbolt-blank is eing automatically positioned, pointed and screw threadedand released from the machine.

Now assuming the several devices and parts of my improved machine forautomatically feeding, and positionin boltblanks to be constructed,combined, positioned and timed substantially as herein shown and furtherassuming that the'action of the feeding mechanism has supplied theimposed blanks, the manner of operation may be described as follows: Theplunger ;0 is advanced to its limit of movement, thereby transferringtheguided bottomblank endwise from the column to the then 'open,spring-pressed j aws 'm, the latter immediately move inward through themedium of levers a, n bolts m, etc., to firmly clamp and hold the headof the thus positioned (see dotted line position in Fig. 1), thereby Vcorres ondin 'l swin in arms n toward the left from the bolts or pins mof the jaws m at which instant the released jaws spring apart andrelease the now completed bolt, which then falls into a receptacle wbelow.

\Vhile I have represented my improved device as being employed with amachine for pointing and screw-threading headed bolt-blanks, it isobvious that it is also equally well adapted for other analogous useswhere an automatically operated holding means for bolt-blanks or otheranal ogous'art-icles such as short rods or studs, is desired.

What I claim as my invention and desire to secure by U. S. LettersPatent is 1 In a machine of the general character described, thecombination with a jawblock and means for positioning a boltblanktherein, of a. pair of oppositely disposed, spring-pressed clamping-jaws slidably mounted in said block, and means,including a pair of armsor levers having camshaped faces engageable with members adjustablymounted in the outer ends of the jaws, for closing the same upon thesaid blank. v

2. In a machineof the general character described, provided with a bedor frame and a tail-stock adjustably secured thereto, the combination ofa stationary jaw-block mounted in the tail-stock, a pair of slidable,oppositely disposed blank-clamping-jaws mounted transversely of themachine in the front end or face of said block member, springs fornormally separating or opening the jaws, stops for limiting the extentof the last-named movement, and means for simultaneously forcing thejaws inward toward each other, for the purpose set forth.

3. In a machine ofthe general character described, the combination of apair of alining, slidably mounted, oppositely disposed, spring-pressedjaws, adapted to yieldingly engage and hold a blank, a horizontalrockshaft, a lever secured to each end of the tionary outer ends of saidjaws, a pair of camfaced levers engageable with saidmembers, and meansfor actuating the said levers.

5. In a device of the class described provided with a bed, thecombination of a' stajaw block, a pair of slidable blank clamplng jawstransversely mounted in the front portion of said block, springs adaptedfor normally separating the jaws, adjustable members in the outer endsof said jaws, a pair of levers, cam faces upon said levers engageablewith said members and adapted v for closing the jaws, and means foractuating the said levers.

6. In a device of the class described provided with a frame and atail-stock adjustably-secured thereto, the combination of a.

stationary jaw block mounted in the tail stock, a pair ofoppositely-disposed slidable blank clamping jaws transversely mounted inthe front portion of said block, spring members adapted for normallyseparating said jaws, stop members adapted for limiting the movement ofsaid jaws, a horizontal' rock shaft, a lever secured to each end of saidshaft, each of said levers having a camshaped upper portion adapted forfrictional engagement with said jaws, a revoluble cam, and meanscooperating with the latter for oscillating said shaft.

7. In a device of the class described having a bed plate and a tailstock adjustablymounted thereon, the combination with a jaw blockmounted in the tail stock. and

means for positioning a bolt-blank therein, arpair of oppositelydisposed alining blank clamping jaws slidably-mounted in the forwardportion of said block and adapted for 'yieldably-engaging and holding ablank, spring-members mounted in said blocks contacting said jaws andadapted for limiting the movement of said jaws, adjustable membersmounted in the outer ends of the jaws, a horizontal rock shaftpositioned transversely of the device and below said jaws, a leversecured to each end of the shaft, each lever having its upper portioncam-shaped and adapted for frictionally engaging the outer end of saidadjustable members, a revoluble cam, a rocker arm upon one end ofsaidshaft and having an angular terminal portion provided with alongitudinal slot therein, a pivoted lever having one end in engagementwith said cam and its other end engaging with said slot and adapted foroscillating said shaft and simultaneously oscillating the said jaws.

In testimony whereof I have afiixed my signature in presence of twowitnesses.

THOMAS F. KELLY. Witnesses:

Gno. H. REMINGTON, CALVIN H. BROWN:

